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The Rate Law

Total questions: 10

Worksheet time: 8mins

Name
Class
Date
1.

The rate of a reaction is dependent on the concentration of the reactants

a)

True

b)

False

2.

What does a catalyst do?

a)

Increase the rate of all steps of a reaction.

b)

Lowers the activation energy of the slow step

c)

Cools the reaction down

d)

Increases the concentration of the reaction

3.

In an exothermic reaction, heat is ...

a)

absorbed

b)

released

4.
What is the catalyst in the following rate mechanism?
a)
HBr
b)
H2O
c)
There is no catalyst
5.
Which of the elementary steps  has the highest activation energy?
a)
slow
b)
fast
6.

What is the rate law for this mechanism?

a)

rate = k[X]2[B]

b)

rate = [A][B]

c)

rate = [A][B]2

d)

rate = [W][Y][Z]

7.

What type of elementary reaction step is below:

A + B --> AB

a)

Unimolecular

b)

Bimolecular

c)

Termolecular

8.

What type of elementary reaction step is below:


3A --> Products

a)

Unimolecular

b)

Bimolecular

c)

Termolecular

9.

What is the rate law for the below Bimolecular elementary reaction?

A + B --> AB

a)

rate = k[A]2

b)

rate = k[B]2

c)

rate = k[A][B]

d)

rate = k[A]2[B]2

10.

What is the rate law for the below Termolecular elementary reaction?


CH3 + O2 + M --> CH3O2 + M

a)

rate = k[CH3]

b)

rate = k[CH3][O2][M]

c)

rate = k[CH3][O2][M]3

d)

rate = k[CH3][O2]